LIEF/examples/python/elf_unstrip.py
2017-03-30 16:56:49 +02:00

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Description
# -----------
# In this example, we assume that we found
# the ``main`` function at address 0x402A00
# and we add a static symbol to the binary
# so that we can do:
#
# (gdb) break main
# Breakpoint 1 at 0x402a00
from lief import ELF
import sys
binary = ELF.parse(sys.argv[1])
symtab_section = ELF.Section()
symtab_section.name = ""
symtab_section.type = ELF.SECTION_TYPES.SYMTAB
symtab_section.entry_size = 0x18
symtab_section.alignment = 8
symtab_section.link = len(binary.sections) + 1
symtab_section.content = [0] * 100
symstr_section = ELF.Section()
symstr_section.name = ""
symstr_section.type = ELF.SECTION_TYPES.STRTAB
symstr_section.entry_size = 1
symstr_section.alignment = 1
symstr_section.content = [0] * 100
symtab_section = binary.add_section(symtab_section, False)
symstr_section = binary.add_section(symstr_section, False)
symbol = ELF.Symbol()
symbol.name = ""
symbol.type = ELF.SYMBOL_TYPES.NOTYPE
symbol.value = 0
symbol.binding = ELF.SYMBOL_BINDINGS.LOCAL
symbol.size = 0
symbol.shndx = 0
symbol = binary.add_static_symbol(symbol)
symbol = ELF.Symbol()
symbol.name = "main"
symbol.type = ELF.SYMBOL_TYPES.FUNC
symbol.value = 0x402A00
symbol.binding = ELF.SYMBOL_BINDINGS.LOCAL
symbol.shndx = 14
symbol = binary.add_static_symbol(symbol)
print(symbol)
binary.write(sys.argv[2])